This was the first extremely vivid entity I encountered and the experience left me speachless in disbelief. This was many years ago now but its not easy to forget one of these experiences.

A friend and I had just finished a session of hitting hyperspace and everything had been smooth sailing thus far. The bowl was nearly empty, just a bit of ash at the bottom, so I went to clear the pipe with one last toke.

While casually standing in my living room I took a large inhalation, sucking down the last bit of ash and unintentionaly sucking up a thick cloud of smoke. Immediately thinking, "Oh Nooo." I dropped the pipe, actually fell on the floor and began rolling around hysterically. The room became filled with nets and webs of blue and green light. This time was I felt confused and nervous. I remember saying, "I don't think I like this." out loud and my friend asking me if I was ok.
Geometric shapes of primary colors took over everything, they started turning, twisting, and reaching into eachother. Opening eachother up in ways I having trouble comprehending, eventually materializing into a Guy Fawkes mask. The word "Welcome" was heard clearly in a deep voice. The mask starred at me/into me intently and then began to crack a smile that became extremely exaggerated.
This was the end of an intence experience for sure.

Other Guy Fawkes instances:
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